Alert archive / Montana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 19, NWS Missoula, MT

June 4, 2012Mineral County, Sanders County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 4, 2012, 11:11 PM MDT for Mineral County, Sanders County, Montana. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 4, 2012, 11:11 PM MDT (05:11 UTC)
Expired: Jun 4, 2012, 11:46 PM MDT
In force: 35 min
Issued by: NWS Missoula, MT
Area: Storm-based polygon

Counties Mineral County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 85 km from the middle of the area, began a volume at 05:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 4, 1:46 PM MDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 5.2 hours before the alert went out and 113 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1397 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

447 
WUUS55 KMSO 050511
SVRMSO
MTC061-089-050600-
/O.NEW.KMSO.SV.W.0019.120605T0511Z-120605T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
1111 PM MDT MON JUN 4 2012

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL SANDERS COUNTY IN NORTHWEST MONTANA...
  NORTHERN MINERAL COUNTY IN WEST CENTRAL MONTANA...

* UNTIL MIDNIGHT MDT.

* AT 1108 PM MDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 27 MILES SOUTH OF HAUGAN TO 11 MILES
  SOUTHWEST OF SUPERIOR TO SUPERIOR TO 7 MILES SOUTH OF SUPERIOR...OR
  ALONG A LINE EXTENDING FROM 29 MILES SOUTHWEST OF SAINT REGIS TO 11
  MILES SOUTHWEST OF SUPERIOR TO SUPERIOR TO 7 MILES SOUTH OF
  SUPERIOR...AND WERE MOVING NORTH AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...BELKNAP...CAMAS...DE BORGIA...EDDY...
  HAUGAN...HOT SPRINGS...KEYSTONE...LONEPINE...LOZEAU...NIARADA...
  PARADISE...PLAINS...SNIDER...SAINT REGIS...SUPERIOR...THOMPSON
  FALLS AND WEEKSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. DAMAGING WINDS
ARE POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR
PROTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT
OUTSIDE...MOVE TO A WELL PROTECTED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.

&&

LAT...LON 4779 11537 4789 11500 4787 11499 4788 11461
      4760 11459 4759 11456 4728 11468 4725 11472
      4726 11479 4723 11476 4722 11471 4699 11478
      4709 11502 4706 11513 4718 11530 4725 11534
      4731 11554
TIME...MOT...LOC 0511Z 194DEG 55KT 4705 11552 4717 11510
          4719 11497 4714 11486

$$

DICKERSON

2 follow-up statements

936 
WWUS55 KMSO 050531
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1131 PM MDT MON JUN 4 2012

MTC061-089-050600-
/O.CON.KMSO.SV.W.0019.000000T0000Z-120605T0600Z/
MINERAL MT-SANDERS MT-
1131 PM MDT MON JUN 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FOR CENTRAL SANDERS AND NORTHERN MINERAL COUNTIES...

* AT 1128 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING ONE INCH HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF HAUGAN TO 8 MILES
  SOUTH OF EDDY TO PLAINS TO KEYSTONE...OR ALONG A LINE EXTENDING
  FROM 15 MILES WEST OF SAINT REGIS TO 10 MILES NORTH OF SAINT REGIS
  TO 13 MILES NORTHEAST OF SAINT REGIS TO 10 MILES EAST OF SAINT
  REGIS...AND WERE MOVING NORTH AT 65 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...VERY HEAVY RAIN 
AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO 
A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM 
WINDOWS.

HAIL UP TO THREE QUARTERS OF AN INCH IN DIAMETER HAVE BEEN REPORTED 
IN SAINT REGIS WITH THIS STORM. IF YOU ARE IN THE PATH OF THE 
STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4779 11537 4789 11500 4787 11499 4788 11461
      4786 11461 4743 11471 4726 11481 4726 11501
      4721 11517 4718 11530 4725 11534 4731 11554
TIME...MOT...LOC 0530Z 194DEG 55KT 4733 11542 4747 11513
          4749 11493 4737 11489

$$

DICKERSON

668 
WWUS55 KMSO 050546
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1146 PM MDT MON JUN 4 2012

MTC061-089-050555-
/O.CAN.KMSO.SV.W.0019.000000T0000Z-120605T0600Z/
MINERAL MT-SANDERS MT-
1146 PM MDT MON JUN 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SANDERS AND NORTHERN
MINERAL COUNTIES IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.

LAT...LON 4779 11537 4789 11500 4787 11499 4788 11461
      4786 11461 4743 11471 4726 11481 4726 11501
      4721 11517 4718 11530 4725 11534 4731 11554
TIME...MOT...LOC 0545Z 194DEG 55KT 4755 11534 4769 11505
          4771 11485 4759 11481

$$

DICKERSON

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 7:05 PM MDT	Special Weather Statement	MSO		40 min
Jun 4, 11:10 PM MDT	Severe Thunderstorm Warning	MSO	Lincoln	22 min
Jun 5, 2:34 PM MDT	Winter Weather Advisory	MSO	Flathead, Lake	27 hr

Nearby

Severe Thunderstorm Warnings in Montana, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.